英文關鍵字
close
closeup
conduit
connection
control
duct
equipment
faucet
fire
firefighter
flowing
grass
ground
handle
hands
hose
hoses
industrial
industry
iron
liquid
main
male
metal
nature
object
open
outdoor
pipe
pipeline
plumbing
power
pressure
service
supply
technology
tube
tubing
turn
valve
vent
water
wet
wheel
work